T-H Marine barbed tee fittings are molded specifically to fit marine hose dimensions.
Reducing tees all have the two main legs of the tee with the same barb dimension, and the third leg with a smaller dimension. These unique tees allow you to drain multiple smaller hoses into one main drain; therby reducing the total number of exit fittings you need to drain multiple sources. Not only do they save you money by reducing the number of fittings needed, they also reduce the number of holes that need to be cut into the hull for exit fittings.